Power System Fault Diagnosis Considering Absence of Alarm Messages of Circuit Breakers on the Border of Outage Area
Power System Fault Diagnosis Considering Absence of Alarm Messages of Circuit Breakers on the Border of Outage Area
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发表时间：
2013
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通讯作者：
Li Zhaofei
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作者：
Li Zhaofei
当电网中的某个区段发生故障时，相应的保护继电器将跳闸相关断路器，切断故障电流，从而形成一个或多个停电区域。如果将故障区段限制在停电区域内，则将大大提高故障诊断程序的效率。另一方面，如果控制中心无法接收到断路器的全部报警信息，则由于无法获得停电区域，必须对所有区段进行诊断。此外，错误诊断在此背景下，基于图论，可以通过节点割集来划分一个或多个故障区域。采用多目标优化方法天际线查询，根据故障断面的准确率对故障区域进行递减排序。所开发的诊断方法可以使诊断程序更快，并能保证故障断面不会被遗漏。以Petri网为诊断工具，并通过实例验证了该方法的准确性。
When a fault takes place on a section in a power grid,the corresponding protective relays will trip the related circuit breakers to cut off the fault current.As a result,one or more outage areas would be formed.If the faulty section is restricted in the outage area,the efficiency of fault diagnosis program will be greatly promoted.On the other side,if the control center can not receive the whole alarm message of circuit beakers,all of the sections must be diagnosed because the outrage area can not be gotten.Furthermore,wrong diagnosis results may be gotten because of the missing of alarm messages.Given this back ground,based on graph theory,one or more outrage area can be partitioned by cut-set of nodes.Multi-objective optimization method skyline query was applied to sort the outrage area decreasingly based on the precision rate of fault section.The developed diagnosis method could make the diagnosis program much faster,and can insure the fault section will not be omitted.Petri net was applied as the diagnosis tool and several examples showed the accuracy of this method.